Preparation of electrospun chitosan/poly(vinyl alcohol) membranes

被引:0
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作者
Yuanyuan Zhang
Xiaobo Huang
Bin Duan
Lili Wu
Shuo Li
Xiaoyan Yuan
机构
[1] Tianjin University,School of Materials Science and Engineering
来源
关键词
Chitosan; Poly(vinyl alcohol); Electrospinnability; Morphology; Hydrogen bond;
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学科分类号
摘要
Electrospinning of chitosan from its solutions in 2% aqueous acetic acid was studied by adding poly(vinyl alcohol) (PVA) as a “guest” polymer. Properties of the chitosan/PVA solutions including viscosity, conductivity, and surface tension were measured, and effects of the polymer concentration, chitosan/PVA mass ratio and processing parameters (applied voltage, flow rate, capillary-to-collector distance) on the electrospinnability of chitosan/PVA were investigated. Analyses of scanning electron micrographs and transmission electron micrographs suggested that the chitosan/PVA ultrafine fibers were often obtained along with beads, and chitosan was located in the elctrospun fibers as well as in the beads. Uniform chitosan/PVA fibers with an average diameter of 99 ± 21 nm could be prepared from a 7% chitosan/PVA solution in 40:60 mass ratio. Results of Fourier transform infrared spectroscopy and X-ray diffraction demonstrated that there were possible hydrogen bonds between chitosan and PVA molecules, which could weaken the strong interaction in chitosan itself and facilitate chitosan/PVA electrospinnability. The electrospun chitosan/PVA membranes showed higher water uptake and would have potential applications in wound dressings.
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页码:855 / 863
页数:8
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